1. ASM International N.V.
2. Beijing Grish Hitech Co. Ltd.
3. Coherent Corporation
4. Electronics and Materials Corporation
5. GlobalWafers Co. Ltd.
6. Intego GmbH
7. IQE PLC
8. JEJE Deutschland GmbH
9. JXT Technology Co. Ltd.
10. PlutoSemi Co. Ltd.
11. Resonac Corporation by Showa Denko K. K.
12. Silicon Materials Inc.
13. Siltronic AG
14. Stanford Advanced Materials by Oceania International LLC
15. Sumco Corporation
16. Sumitomo Electric Industries
Ltd.
17. VIGO Photonics S.A.
18. Wafer Works (Shanghai) Co. Ltd.
19. Western Minmetals (SC) Corporation
20. Xiamen Powerway Advenced Materials Co. Ltd.